Crappers...
I saw these tubes a while back!!!!
"Don't be in a hurry. The only way to sex Angelfish, is by observation of the mating tubes, of the fish. The females tube, is about 1/8 inch long, somewhat longer than the males. The males tube, is shorter and more blunt shaped. The tubes are visible, only shortly before and during spawning. "
Mine must've spawned and I never noticed :(